Rostrum (anatomy)

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Crustacean: the rostrum of the shrimp Macrobrachium rosenbergii is serrated along both edges.
Insect: assassin bug piercing its prey with its rostrum
Cephalopod: the two-part beak of a giant squid
The rostrum of a bottlenose dolphin

The term rostrum (from the Latin rostrum, meaning "beak") is used for a number of unrelated structures in different groups of animals:

  • In crustaceans, the rostrum is the forward extension of the carapace in front of the eyes.[1] It is generally a rigid structure, but can be connected by a hinged joint, as seen in Leptostraca.[2]


  1. ^ Charles Drew (November 17, 2003). "Crustacea". University of Bristol. Retrieved November 7, 2010. 
  2. ^ Todd A. Haney, Joel W. Martin & Eric W. Vetter (2007). "Leptostraca". In James T. Carlton. The Light and Smith Manual: Intertidal Invertebrates from Central California to Oregon (4th ed.). University of California Press. pp. 484–495. ISBN 978-0-520-23939-5. 
  3. ^ George Gordh, Gordon Gordh & David Headrick (2003). "Rostrum". A Dictionary of Entomology. CAB International. p. 792. ISBN 978-0-85199-655-4. 
  4. ^ Douglas Grant Smith (2001). "Mollusca (gastropods, pelecypods)". Pennak's freshwater invertebrates of the United States: Porifera to Crustacea (4th ed.). John Wiley and Sons. pp. 327–400. ISBN 978-0-471-35837-4. 
  5. ^ Burt Carter. "Cephalopods". Invertebrate Paleobiology. 
  6. ^ "Basic anatomy of Cetaceans - Dolphins". Robin's Island. Retrieved November 7, 2010.